Piezoelectric pump

Abstract

The piezoelectric pump comprises a supporting frame and at least one pump body assembly, the supporting frame comprises a mounting plate and a side plate, the mounting plate comprises a top face and a bottom face which are opposite, the side plate surrounds the edge of the mounting plate, the mounting plate is provided with a through hole penetrating through the top face and the bottom face, and the side plate is provided with a first vent hole; each group of pump body components comprises a first pump body and a second pump body, the first pump body is arranged on the top surface and is communicated with the through hole, and the second pump body is arranged on the bottom surface and is communicated with the through hole, so that when the first pump body and the second pump body work simultaneously, the first pump body and the second pump body are communicated with each other; and superposed gas output or gas suction amount is generated in the first vent hole. The first pump body and the second pump body can guide the airflow moving direction at the same time, and therefore the purpose of increasing flow is achieved. At least one pump body assembly is arranged on the same supporting frame, and the number of parts of the piezoelectric pump can be reduced. The volume is reduced while the flow is increased, and the integration level of the piezoelectric pump is improved.

Description

Technical Field

[0001] The present application relates to the technical field of fluid control devices, and in particular to a piezoelectric pump. Background Art

[0002] Piezoelectric pumps utilize the inverse piezoelectric effect of piezoelectric materials to drive the transmission of fluids (including liquids, gases, gas-liquid mixtures, etc.) through the deformation of the vibrating part. Piezoelectric pumps are widely used in micro negative pressure equipment due to their low energy consumption, high density, and high operating frequency.

[0003] However, the flow rate of the existing piezoelectric pump is affected by its own volume. The larger the flow rate of the piezoelectric pump, the larger the volume. Under the premise of ensuring the flow rate demand, the volume of the existing piezoelectric pump is very large. Utility Model Content

[0004] The present application provides a piezoelectric pump, which includes a support frame and at least one group of pump body components, the support frame includes a mounting plate and a side plate, the mounting plate includes a top surface and a bottom surface opposite to each other, the side plates are arranged around the edge of the mounting plate, the mounting plate is provided with a through hole penetrating the top surface and the bottom surface, the side plate is provided with a first air vent, the first air vent is connected to the through hole, the first air vent is used for air intake or exhaust, each group of pump body components includes a first pump body and a second pump body, the first pump body is arranged on the top surface and connected to the through hole, the second pump body is arranged on the bottom surface and connected to the through hole, so that when the first pump body and the second pump body work simultaneously, an overlapping air outlet or air intake volume is generated at the first air vent.

[0005] In one embodiment, a first accommodating groove is provided on the top surface, a second accommodating groove is provided on the bottom surface, a through hole connects the first accommodating groove and the second accommodating groove, the first pump body is provided in the first accommodating groove, and the second pump body is provided in the second accommodating groove.

[0006] In one embodiment, the top surface and the bottom surface are both provided with a rubber baffle plate, the rubber baffle plate is arranged around the through hole, a rubber groove is formed between the rubber baffle plate and the side plate, and the first pump body and the second pump body are bonded to the mounting plate by glue.

[0007] In one embodiment, the first pump body is entirely contained in the first containing groove, and the second pump body is entirely contained in the second containing groove.

[0008] In one embodiment, the first accommodating groove and the second accommodating groove are symmetrically arranged on two sides of the mounting plate.

[0009] In one embodiment, the first vent hole penetrates the side plate and the mounting plate and is connected to the through hole, and the distance between the center line of the first vent hole and the first pump body is equal to the distance between the center line of the first vent hole and the second pump body.

[0010] In one embodiment, the side plate is provided with an air nozzle, which is coaxially arranged and communicated with the first vent hole.

[0011] In one embodiment, the first pump body includes a first actuator and a first terminal electrically connected to the first actuator, the side plate is provided with a first clearance groove, the first terminal extends out of the first clearance groove and is used to connect to a power source.

[0012] In one embodiment, the second pump body includes a second actuator and a second terminal electrically connected to the second actuator, the side plate is provided with a second clearance groove, the second terminal extends out of the second clearance groove and is used to connect to a power source.

[0013] In one embodiment, the first clearance groove and the second clearance groove are opened on the same side of the side plate.

[0014] In one embodiment, there are multiple groups of pump body components, and there are multiple through holes, and the multiple through holes are arranged in a one-to-one correspondence with the multiple groups of pump body components.

[0015] The piezoelectric pump provided by the present application, each group of pump body components includes a first pump body and a second pump body, and the first pump body and the second pump body can simultaneously guide the direction of airflow movement, thereby achieving the purpose of increasing the flow rate. At least one group of pump body components are arranged on the same support frame, which can reduce the number of parts of the piezoelectric pump, and the first pump body and the second pump body work together, and the distance between the first pump body and the second pump body of the same support frame is shorter, thereby reducing the energy loss of the first pump body and the second pump body, thereby improving the energy utilization rate of the piezoelectric pump. While increasing the flow rate, the volume is reduced, and the integration of the piezoelectric pump is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of a piezoelectric pump provided in one embodiment of the present application;

[0018] Figure 2 An exploded schematic diagram of a piezoelectric pump provided in one embodiment of the present application;

[0019] Figure 3 An exploded schematic diagram of another piezoelectric pump provided in an embodiment of the present application;

[0020] Figure 4 An exploded schematic diagram of a first pump body provided in one embodiment of the present application;

[0021] Figure 5 A schematic diagram of the structure of another piezoelectric pump provided in an embodiment of the present application

[0022] Figure 6 A schematic diagram of the structure of yet another piezoelectric pump provided in an embodiment of the present application.

[0023] Main component numbers: piezoelectric pump 100, support frame 10, mounting plate 11, top surface 111, bottom surface 112, through hole 113, rubber baffle 114, first accommodating groove 115, second accommodating groove 116, rubber groove 117, side plate 12, first air vent 121, first make way groove 122, second make way groove 123, air nozzle 124, pump body assembly 20, first pump body 21, first actuator 211, first terminal 212, second pump body 22, second actuator 221, second terminal 222, vibration plate 31, actuator 32, electrode plate 33, base 34, resonance plate 35, second air vent 351, air inlet 36, air outlet 37. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or state relationships based on the positions or state relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating a position or state relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0027] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components, which may be the same or different in specific types and configurations, and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more. The following will be described in detail with reference to the accompanying drawings.

[0029] This application provides a piezoelectric pump 100, see Figure 1 , Figure 2 as well as Figure 3 The piezoelectric pump 100 includes a support frame 10 and at least one group of pump body components 20. The support frame 10 may be a metal support frame, for example, the support frame 10 may be an aluminum alloy support frame. The metal support frame has the characteristics of high strength and high thermal conductivity. The high-strength support frame 10 has a certain protective effect, and the heat generated by the pump body component 20 during operation can be conducted away by the metal support frame 10, thereby ensuring the normal use of the piezoelectric pump 100. The support frame 10 may include a mounting plate 11 and a side plate 12. The mounting plate 11 may be set to a sheet structure, and the mounting plate 11 may provide a plane required for the installation of the pump body component 20. The size of the mounting plate 11 may be greater than or equal to the size of the pump body component 20, so that the pump body component 20 can be completely placed within the range of the mounting plate 11. The mounting plate 11 includes a top surface 111 and a bottom surface 112 facing each other, and the side plate 12 is arranged around the edge of the mounting plate 11. The side plate 12 extends toward both sides of the mounting plate 11, so that a first mounting space is formed between the side plate 12 and the top surface 111, and a second mounting space is formed between the side plate 12 and the bottom surface 112. The mounting plate 11 is provided with a through hole 113 penetrating the top surface 111 and the bottom surface 112, and the side plate 12 is provided with a first vent hole 121, the first vent hole 121 is connected to the through hole 113, and the first vent hole 121 is used for air intake or air discharge. Each group of pump body components 20 includes a first pump body 21 and a second pump body 22, the first pump body 21 is arranged on the top surface 111 and is connected to the through hole 113, and the second pump body 22 is arranged on the bottom surface 112 and is connected to the through hole 113, so that when the first pump body 21 and the second pump body 22 work simultaneously, the first vent hole 121 generates a superimposed air discharge or air intake.

[0030] For more information, please refer to 2 and Figure 4, the first pump body 21 and the second pump body 22 both include a vibrating sheet 31, an actuator 32 and an electrode sheet 33. Taking the first pump body 21 as an example, the vibrating sheet 31 and the electrode sheet 33 are arranged at intervals, the actuator 32 is arranged on the surface of the vibrating sheet 31 close to the electrode sheet 33, and the two ends of the actuator 32 are electrically connected to the vibrating sheet 31 and the electrode sheet 33. The actuator 32 can be a piezoelectric ceramic, which has a piezoelectric effect. The vibrating sheet 31 and the electrode sheet 33 can both be conductive materials, and the vibrating sheet 31 and the electrode sheet 33 can be connected to the two ends of the power supply respectively. Among them, the power supply can be a DC power supply or an AC power supply. In order to avoid a short circuit between the vibrating sheet 31 and the electrode sheet 33, an insulating layer 39 is arranged between the vibrating sheet 31 and the electrode sheet 33, and the insulating layer 39 can be made of insulating materials such as plastic to electrically insulate the vibrating sheet 31 and the electrode sheet 33 from each other. The current of the vibrating sheet 31 and the electrode sheet 33 is transmitted to the two ends of the actuator 32, and the actuator 32 can generate mechanical vibration. The first pump body 21 and the second pump body 22 both include an air inlet 36 and an air outlet 37. When an electric field is generated at both ends of the actuator 32, the actuator 32 can generate vibration, thereby forcing negative pressure to be generated in the piezoelectric pump 100, so that external air can enter the piezoelectric pump 100 from the air inlet 36, and the incoming air flow can be discharged from the air outlet 37 of the piezoelectric pump 100.

[0031] In one implementation, please continue to refer to 2 and Figure 4The piezoelectric pump 100 may further include a base 34 and a resonant plate 35, an air inlet 36 is arranged on the base 34, the base 34 is arranged on the side of the vibrating plate 31 away from the actuator 32, and the resonant plate 35 is arranged on the side of the vibrating plate 31 close to the base 34. When the actuator 32 is excited, it vibrates and drives the vibrating plate 31 to vibrate together. The resonant plate 35 may be a metal sheet, and the resonant plate 35 may have certain ductility and elasticity, so that the resonant plate 35 can be driven by the actuator 32 to produce a larger deformation, ensure that the resonant plate 35 has a sufficient vibration amplitude, and then ensure the driving effect of the resonant plate 35 on the external air. Negative pressure will be generated between the resonant plate 35 and the vibrating plate 31, thereby forcing the resonant plate 35 to deform. Negative pressure will also be generated between the deformed resonant plate 35 and the base 34, forcing the air around the air inlet 36 to enter between the resonant plate 35 and the base 34. The resonant plate 35 is provided with a second vent hole 351. When the actuator 32 moves toward the direction close to the resonant plate 35, the actuator 32 drives the resonant plate 35 to restore the initial state, and the airflow between the resonant plate 35 and the base 34 enters the piezoelectric pump 100 from the second vent hole 351. When the actuator 32 drives the resonant plate 35 to deform, the airflow is squeezed and discharged from the air outlet 37 to complete the suction or pumping task of the piezoelectric pump 100. A vibration space is formed in the base 34. More specifically, the edge of the base 34 can extend toward the resonant plate 35 to form a vibration space. At least one of the vibration plate 31, the actuator 32, the electrode plate 33 and the resonant plate 35 vibrates in the vibration space.

[0032] Please also refer to 2 and Figure 3 In this embodiment, the function of the piezoelectric pump 100 is not limited, that is, the piezoelectric pump 100 can be a vacuum pump or an air pump, and the connection relationship between the air inlet 36 and the air outlet 37 and the through hole 113 can be selected according to the function of the piezoelectric pump 100. For example, Figure 2 As shown, the piezoelectric pump 100 can be a vacuum pump, the air inlet 36 can be connected to the through hole 113, the air outlet 37 faces the direction away from the support frame 10, and other equipment is connected to the first vent 121, and the air in the other equipment can be discharged through the piezoelectric pump 100 to ensure the vacuum inside the other equipment. Figure 3 As shown, the piezoelectric pump 100 can be an air pump, the air outlet 37 can be connected to the through hole 113, the air inlet 36 faces away from the support frame 10, and other devices are connected to the first air vent 121. The piezoelectric pump 100 can be used to fill the outside air into other devices to increase the internal pressure of other devices and ensure the air flow inside other devices.

[0033] In a more specific embodiment, see Figure 1 as well as Figure 2The first pump body 21 includes a first actuator 211 and a first terminal 212 electrically connected to the first actuator 211. The first terminal 212 can be a metal sheet or a metal wire for connecting a power source or other electronic devices. The side panel 12 is provided with a first clearance groove 122, and the first terminal 212 extends out of the first clearance groove 122 and is used to connect a power source. When in use, the first terminal 212 can be connected to an external power source or other electronic device, and the action of the first actuator 211 can be controlled by controlling the power source or other electronic device, thereby driving the movement of the pump body. The first clearance groove 122 on the side panel 12 can make it easier for the first terminal 212 to extend out of the side panel 12 and connect to an external device, thereby increasing the stability and reliability of the connection. In addition, the first clearance groove 122 can position the first actuator 211, ensure the position accuracy of the first actuator 211, and avoid interference of other elements on the first actuator 211.

[0034] The second pump body 22 includes a second actuator 221 and a second terminal 222 electrically connected to the second actuator 221, and the second terminal 222 can be a metal sheet or a metal wire for connecting a power source or other electronic devices. The side panel 12 is provided with a second clearance groove 123, and the second terminal 222 extends out of the second clearance groove 123 and is used to connect a power source. When in use, the second terminal 222 can be connected to an external power source or other electronic device, and the action of the second actuator 221 can be controlled by controlling the power source or other electronic device, thereby driving the movement of the pump body. The second clearance groove 123 on the side panel 12 can make it easier for the second terminal 222 to extend out of the side panel 12 and connect to an external device, thereby increasing the stability and reliability of the connection. In addition, the second clearance groove 123 can position the second actuator 221, ensure the position accuracy of the second actuator 221, and avoid interference of other elements with the second actuator 221.

[0035] The number of the first terminal 212 and the second terminal 222 can be multiple to meet the current requirements of the first actuator 211 and the second actuator 221. For example, the number of the first terminal 212 and the second terminal 222 are both 2, so that the two ends of the first actuator 211 and the second actuator 221 can be connected to the positive and negative poles of the DC power supply or the neutral line and the live line of the AC power supply, etc., to ensure the normal operation of the first actuator 211 and the second actuator 221. In addition, the number of the first clearance grooves 122 is set corresponding to the number of the first terminal 212, and the number of the second clearance grooves 123 is set corresponding to the number of the second terminal 222, so that the first terminal 212 and the second terminal 222 can smoothly extend out of the piezoelectric pump 100 and be electrically connected to the external power supply. Alternatively, the first make way slot 122 can be set to one, and multiple first wiring terminals 212 are all set in the single first make way slot 122; the second make way slot 123 can be set to one, and multiple second wiring terminals 222 are all set in the single second make way slot 123, so as to avoid the structural strength of the support frame 10 being weakened due to too many grooves, thereby ensuring the structural strength of the piezoelectric pump 100.

[0036] Preferably, the first clearance groove 122 and the second clearance groove 123 are opened on the same side of the side plate 12, so that the first terminal 212 and the second terminal 222 can be arranged on the same side of the support member, which facilitates the quick connection of the piezoelectric pump 100 and makes the wiring more regular after connection to avoid cluttered wiring.

[0037] The above embodiments are merely examples, and the specific number, relative position, etc. of the first wiring terminal 212 and the second wiring terminal 222 may vary depending on the application scenario, usage requirements, etc., and this embodiment does not limit this.

[0038] In one embodiment, the first pump body 21 and the second pump body 22 can be configured to inhale or exhaust air at the same time, that is, at the same time, the first actuator 211 of the first pump body 21 and the second actuator 221 of the second pump body 22 move toward / away from each other, the first actuator 211 drives the vibration plate 31 and the resonance plate 35 of the first pump body 21, and the second actuator 221 drives the vibration plate 31 and the resonance plate 35 of the second pump body 22, so that the first pump body 21 and the second pump body 22 generate superimposed air discharge or air intake at the first vent 121. Avoid the first pump body 21 and the second pump body 22 not working together, resulting in airflow flowing between the first pump body 21 and the second pump body 22, causing unnecessary energy waste.

[0039] To further improve the installation and sealing performance of the piezoelectric pump 100. In one embodiment, refer to Figure 2, the top surface 111 is provided with a first receiving groove 115, i.e., a first installation space, and the first pump body 21 is arranged in the first receiving groove 115. The bottom surface 112 is provided with a second receiving groove 116, i.e., a second installation space, and the second pump body 22 is arranged in the second receiving groove 116. The first pump body 21 and the second pump body 22 can be fully accommodated in the two receiving grooves respectively, so that the pump body can be more stably installed on the mounting plate 11, and the sealing problem between the first pump body 21 and the second pump body 22 and the mounting plate 11 is effectively avoided. In addition, during the pre-installation process, the side plate 12 can install and position the first pump body 21 and the second pump body 22. The through hole 113 connects the first receiving groove 115 and the second receiving groove 116, and the first pump body 21 and the second pump body 22 both work stably in their respective receiving grooves and are connected by the through hole 113, thereby improving the pumping efficiency.

[0040] Preferably, the first pump body 21 is completely contained in the first containing groove 115, and the second pump body 22 is completely contained in the second containing groove 116. By completely containing the first pump body 21 and the second pump body 22 in the first containing groove 115 and the second containing groove 116, the side plate 12 can resist the impact on the sides of the first pump body 21 and the second pump body 22, thereby providing better protection for the first pump body 21 and the second pump body 22. The piezoelectric pump 100 can further improve the stability and sealing of the pump body, and increase the application range and service life of the piezoelectric pump 100.

[0041] In the piezoelectric pump 100, the first pump body 21 and the second pump body 22 are interconnected, so that the first pump body 21 and the second pump body 22 form an integral pumping system or extraction system in structure. In one embodiment, in the selection and design of the first pump body 21 and the second pump body 22, pump bodies with the same parameters such as power and size can be selected. For example, the first pump body 21 and the second pump body 22 have the same parameters such as power and size. When the first pump body 21 and the second pump body 22 pump gas, no additional resistance or pressure loss will be generated between the two pump bodies, thereby improving the pumping efficiency. And the changes in parameters such as pressure and flow rate during the operation of the piezoelectric pump 100 will remain consistent, thereby increasing the stability of the entire pumping system. In addition, improving the versatility of the components of the piezoelectric pump 100 can save labor costs in the procurement and installation processes.

[0042] In one embodiment, the first accommodating groove 115 and the second accommodating groove 116 are symmetrically arranged on both sides of the mounting plate 11, and the first accommodating groove 115 for mounting the first pump body 21 and the second accommodating space for mounting the second pump body 22 have the same volume. When the first pump body 21 and the second pump body 22 can simultaneously select a larger pump body, the flow rate of the piezoelectric pump 100 is increased. In addition, the symmetrical arrangement design makes the first pump body 21 and the second pump body 22 more convenient and quick during the installation process, while also increasing the stability of the piezoelectric pump 100 and reducing the vibration and noise of the piezoelectric pump 100 during use.

[0043] In one embodiment, see Figure 2 , the top surface 111 and the bottom surface 112 are both provided with a rubber baffle 114, which can be integrally formed with the support frame 10, or the foot plate can be provided on the surface of the support frame 10 by bonding, welding, etc. The material of the rubber baffle 114 can be selected from plastic or stainless steel with good corrosion resistance and high temperature resistance to ensure the stability and durability of the pump body. The rubber baffle 114 is arranged around the through hole 113, and a glue groove 117 is formed between the rubber baffle 114 and the side plate 12. The size parameters of the glue groove 117 can be set according to the size and position relationship of the outer edges of the first pump body 21 and the second pump body 22, the air inlet 36 and the air outlet 37, etc., and this embodiment does not limit it. The first pump body 21 and the second pump body 22 are bonded to the mounting plate 11 by glue. The first pump body 21 and the second pump body 22 can be bonded to the support frame 10 by glue, and the bonding method can ensure the stability of the pump body, improve the airtightness of the piezoelectric pump 100, and can also achieve fast and easy installation. In another embodiment, the first pump body 21 and the second pump body 22 can also be fixed by other connection methods, such as screw fixing, welding, etc.

[0044] In one embodiment, please refer to Figure 1 as well as Figure 2 , the first vent hole 121 passes through the side plate 12 and the mounting plate 11, and the first vent hole 121 is connected to the through hole 113. Such a design increases the connectivity between the first pump body 21 and the second pump body 22, so that the piezoelectric pump 100 can more smoothly intake and exhaust air during operation. And the distance between the center line of the first vent hole 121 and the first pump body 21 is equal to the distance between the center line of the first vent hole 121 and the second pump body 22. The airflow is more stable, and there will be no fluctuations in the airflow, ensuring that the first pump body 21 and the second pump body 22 can evenly intake and exhaust air during operation.

[0045] In one embodiment, please refer to Figure 1 as well as Figure 2The side panel 12 is provided with an air nozzle 124. The air nozzle 124 may have a circular or elliptical hole and may be inlaid with a tubular joint made of metal or plastic, etc., to facilitate connection with other devices. The air nozzle 124 is coaxially arranged and connected to the first air vent 121. The air nozzle 124 is connected to the first air vent 121, and the air flow discharged by the piezoelectric pump 100 can enter the air nozzle 124 from the first air vent 121 and be discharged from the air nozzle 124. Alternatively, the air flow inhaled by the piezoelectric pump 100 can enter the first air vent 121 from the air nozzle 124 and be discharged from the air outlet 37. The air nozzle 124 extends in a direction away from the piezoelectric pump 100, and other devices can be directly mounted on the air nozzle 124 to facilitate the piezoelectric pump 100 to supply air to other devices.

[0046] In some other embodiments, the gas nozzle 124 can also be opened on the top surface 111 or the bottom surface 112. The gas nozzle 124 on the top surface 111 or the bottom surface 112 can be conveniently connected to a pipeline or other equipment to make the gas or liquid flow more smoothly. At the same time, the gas nozzle 124 on the top surface 111 can also prevent the liquid or gas in the pump body from flowing out, ensuring the safety and cleanliness of the working environment.

[0047] In one embodiment, see Figure 2 , Figure 5 as well as Figure 6 , the pump body assembly 20 can be multiple groups, for example, the number of pump body assemblies 20 can be 2 groups, 3 groups, 4 groups..., and this embodiment does not limit it. At this time, there can also be multiple through holes 113, and the multiple through holes 113 are set one by one with the multiple groups of pump body assemblies 20. For example, the number of pump body assemblies 20 can be 2 groups, and the through holes 113 can also be set to 2 accordingly. The first pump body 21 and the second pump body 22 of each group of pump body assemblies 20 are connected to the corresponding through holes 113, and the multiple through holes 113 can be interconnected. The multiple through holes 113 can suck or pump the exhaust airflow of the multiple groups of pump body assemblies 20 from the first vent 121, which can not only ensure the flow rate of the piezoelectric pump 100, but also gather all the airflow in one place.

[0048] The specific examples are as follows: Figure 5 As shown, the pump body assembly 20 may include two groups, and each group of pump body assemblies 20 includes a first pump body 21 and a second pump body 22. Four pump bodies (two first pump bodies 21 and two second pump bodies 22) are respectively arranged on the top surface 111 and the bottom surface 112 of the mounting plate 11. The pump bodies on the top surface 111 and the bottom surface 112 are connected through their respective second vents 351, so that the pump bodies on the top surface 111 and the bottom surface 112 can perform suction operations at the same time. Each group of pump body assemblies 20 can work under the same pressure and flow, thereby ensuring the stability and reliability of each group of pump body assemblies 20. Figure 6As shown, the pump body assembly 20 may include four groups, and each group of pump body assemblies 20 still includes a first pump body 21 and a second pump body 22. Eight pump bodies (four first pump bodies 21 and four second pump bodies 22) are respectively arranged on the top surface 111 and the bottom surface 112 of the mounting plate 11. The pump bodies on the top surface 111 and the bottom surface 112 are connected through their respective second vents 351 to perform efficient suction or pumping operations.

[0049] In summary, the designs of the above two situations both improve the working efficiency and stability of the pump body, save space, and reduce costs. However, the specific implementation methods may vary depending on the application scenario, usage requirements, etc.

[0050] The working principle of the piezoelectric pump 100 of the embodiment of the present application: The following content is described by taking the piezoelectric pump 100 as an air pump as an example. The electrode sheet 30 and the vibration sheet 31 of the first pump body 21 and the second pump body 22 are energized, the first actuator 211 and the second actuator 221 are excited to vibrate, the first actuator 211 and the second actuator 221 move toward each other, and negative pressure is generated at the two ends of the first actuator 211 and the second actuator 221 that are away from each other. The negative pressure will force the vibration sheet 31 and the resonance sheet 35 of the first pump body 21 and the second pump body 22 to deform, causing the external air flow to enter the space between the vibration sheet 31 and the base 34 from the air inlet 36 at the same time. The first actuator 211 and the second actuator 221 move in opposite directions, forcing the vibration sheet 31 and the resonance sheet 35 of the first pump body 21 and the second pump body 22 to return to their original state, and the air flow will enter the vibration space from the second vent 351. When the first actuator 211 and the second actuator 221 move toward each other again, the resonant plate 35 is deformed to squeeze the air in the vibration space, and the airflow in the vibration space has a certain pressure, and then the airflow is discharged from the air outlet 37. The piezoelectric pump 100 can generate a continuous airflow in a reciprocating cycle.

[0051] The piezoelectric pump 100 provided by the present application, each group of pump body components 20 includes a first pump body 21 and a second pump body 22, and the first pump body 21 and the second pump body 22 can simultaneously guide the direction of airflow movement, thereby achieving the purpose of increasing the flow rate. At least one group of pump body components 20 are arranged on the same support frame 10, which can reduce the number of parts of the piezoelectric pump 100, and the first pump body 21 and the second pump body 22 work together, and the distance between the first pump body 21 and the second pump body 22 of the same support frame 10 is shorter, thereby reducing the energy loss of the first pump body 21 and the second pump body 22, and thus improving the energy utilization rate of the piezoelectric pump 100. While increasing the flow rate, the volume is reduced, and the integration of the piezoelectric pump 100 is improved.

[0052] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A piezoelectric pump, characterized in that: The piezoelectric pump comprises: A support frame, the support frame comprises a mounting plate and a side plate, the mounting plate comprises a top surface and a bottom surface opposite to each other, the side plate is arranged around the edge of the mounting plate, the mounting plate is provided with a through hole penetrating the top surface and the bottom surface, the side plate is provided with a first vent hole, the first vent hole is connected to the through hole, and the first vent hole is used for air intake or air outlet; At least one group of pump body assemblies, each group of the pump body assemblies includes a first pump body and a second pump body, the first pump body is arranged on the top surface and connected to the through hole, and the second pump body is arranged on the bottom surface and connected to the through hole, so that when the first pump body and the second pump body work at the same time, an overlapping air outlet or air intake volume is generated in the first ventilation hole.

2. The piezoelectric pump according to claim 1, wherein: The top surface is provided with a first accommodating groove, the bottom surface is provided with a second accommodating groove, the through hole communicates the first accommodating groove and the second accommodating groove, the first pump body is provided in the first accommodating groove, and the second pump body is provided in the second accommodating groove.

3. The piezoelectric pump according to claim 2, wherein: The top surface and the bottom surface are both provided with a rubber baffle plate, the rubber baffle plate is arranged around the through hole, a glue groove is formed between the rubber baffle plate and the side plate, and the first pump body and the second pump body are bonded to the mounting plate by glue.

4. The piezoelectric pump according to claim 2, wherein: The first pump body is completely accommodated in the first containing groove, and the second pump body is completely accommodated in the second containing groove.

5. The piezoelectric pump according to claim 2, wherein: The first accommodating groove and the second accommodating groove are symmetrically arranged on two sides of the mounting plate.

6. The piezoelectric pump according to claim 1, wherein: The first vent hole passes through the side plate and the mounting plate and is connected to the through hole, and the distance between the center line of the first vent hole and the first pump body is equal to the distance between the center line of the first vent hole and the second pump body.

7. The piezoelectric pump according to claim 1, wherein: The side plate is provided with an air nozzle, and the air nozzle is coaxially arranged and communicated with the first vent hole.

8. The piezoelectric pump according to claim 1, wherein: The first pump body includes a first actuator and a first terminal electrically connected to the first actuator. The side plate is provided with a first clearance groove. The first terminal extends out of the first clearance groove and is used to connect to a power source.

9. The piezoelectric pump according to claim 8, wherein: The second pump body includes a second actuator and a second terminal electrically connected to the second actuator. The side plate is provided with a second clearance groove. The second terminal extends out of the second clearance groove and is used for connecting to a power source.

10. The piezoelectric pump according to claim 9, wherein: The first paving groove and the second paving groove are opened on the same side of the side plate.

11. The piezoelectric pump according to claim 1, wherein: There are multiple groups of pump body components, and there are multiple through holes. The multiple through holes are arranged in a one-to-one correspondence with the multiple groups of pump body components.

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